梯级水电开发的流域叠加累积性环境效应逐渐凸显, 客观评价流域梯级水电开发的累积影响并分析其形成机 制, 对丰富累积影响评价理论具有重要的研究意义, 也是流域开发的生态环境累积叠加效应研究的重要基础。本文 基于流域重大水利工程建设的累积影响特性、途径以及评价方法等的基础理论梳理和实践特性概纳, 重点分析累积 影响评价的关键技术和热点问题, 提出了我国流域重大水利工程累积影响研究的理论框架及其在实践中亟待解决 的问题, 并给出对应的完善策略。

Env ir onmental effects o f cascade hy dr opow er dev elo pment on river ecosystems are lar gely cumulative in natur e, w hich are caused by individua lly minor but co llectively signif icant actions t hat accumulate ov er space and t ime. Assessment of water2 shed cumulativ e effects of cascade hy dr opow er development w ith its mechanisms can enr ich the theo ry o f Cumulativ e Effects Assessment ( CEA) and provide the important basis of cumulative effects of ecolog ical enviro nment w ith watershed development. Based on the theoretical and practical theories on the hydro power development including cumulative effects and evaluation method , the key techniques and problems of CEA are analyzed, and the theo retical frame and practical problems of cumulatively environmental assessment of cascade hydropower development in China are proposed, as well as the adaptive manag ement measur es.

国家自然科学基金项目( 51409279)